<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>bootstrap 栅格系统</title>
	<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
	<script type="text/javascript" src="js/bootstrap.min.js"></script>
	<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
	<style type="text/css">
		
		div[class*='col-']{
			height:50px;
			border:1px solid #000;
			background-color:gold;
		}

	</style>
</head>
<body>
	<div class="container" style="background:cyan">
		asdfj
	</div>
	<div class="container">
		<div class="row">
			<div class="col-lg-3">col-lg-3</div>
			<div class="col-lg-3">col-lg-3</div>
			<div class="col-lg-3">col-lg-3</div>
			<div class="col-lg-3">col-lg-3</div>
		</div>
		<br>
		<br>
		<div class="row">
			<div class="col-md-4">col-md-3</div>
			<div class="col-md-4">col-md-3</div>
			<div class="col-md-4">col-md-3</div>
		</div>
		<br>
		<br>
		<div class="row">
			<div class="col-sm-3">col-sm-3</div>
			<div class="col-sm-6">col-sm-6</div>
			<div class="col-sm-3">col-sm-3</div>
		</div>
		<br>
		<br>
		<div class="row">
			<div class="col-xs-1">col-xs-1</div>
			<div class="col-xs-7">col-xs-7</div>
			<div class="col-xs-4">col-xs-4</div>
		</div>	
	</div>
</body>
</html>